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## org.bouncycastle.crypto.threshold
Class ShamirSecretSplitter

    java.lang.Object
      org.bouncycastle.crypto.threshold.ShamirSecretSplitter

All Implemented Interfaces:
  SecretSplitter

public class ShamirSecretSplitter
extends java.lang.Object
implements SecretSplitter

Nested Class Summary
`static class` | `ShamirSecretSplitter.Algorithm`
`static class` | `ShamirSecretSplitter.Mode`

Field Summary
`protected int` | `l` Length of the secret
`protected java.security.SecureRandom` | `random`

Constructor Summary
`ShamirSecretSplitter(ShamirSecretSplitter.Algorithm algorithm, ShamirSecretSplitter.Mode mode, int l, java.security.SecureRandom random)`

Method Summary
`SplitSecret` | `resplit(byte[] secret, int m, int n)` Creates secret shares from a given secret.
`SplitSecret` | `split(int m, int n)` Creates secret shares.
`SplitSecret` | `splitAround(SecretShare s, int m, int n)` Creates secret shares from a given secret share.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### l

    protected int l

  Length of the secret

### random

    protected java.security.SecureRandom random

Constructor Detail

### ShamirSecretSplitter

    public ShamirSecretSplitter(ShamirSecretSplitter.Algorithm algorithm,
                                ShamirSecretSplitter.Mode mode,
                                int l,
                                java.security.SecureRandom random)

Method Detail

### split

    public SplitSecret split(int m,
                             int n)

  Description copied from interface: `SecretSplitter`
  Creates secret shares. The secret will be divided into shares, where the secret has a length of L bytes.

  Specified by:
    `split` in interface `SecretSplitter`
  Parameters:
    `m` - A threshold number of shares
    `n` - Total number of shares
  Returns:
    An array of representing the generated secret shares for m users with l bytes each.

### splitAround

    public SplitSecret splitAround(SecretShare s,
                                   int m,
                                   int n)
                            throws java.io.IOException

  Description copied from interface: `SecretSplitter`
  Creates secret shares from a given secret share. The secret will be divided into shares, where the secret has a length of L bytes.

  Specified by:
    `splitAround` in interface `SecretSplitter`
  Parameters:
    `m` - A threshold number of shares
    `n` - Total number of shares
  Returns:
    An array of representing the generated secret shares for m users with l bytes each.
  Throws:
    `java.io.IOException`

### resplit

    public SplitSecret resplit(byte[] secret,
                               int m,
                               int n)

  Description copied from interface: `SecretSplitter`
  Creates secret shares from a given secret. The secret will be divided into shares, where the secret has a length of L bytes.

  Specified by:
    `resplit` in interface `SecretSplitter`
  Parameters:
    `m` - A threshold number of shares
    `n` - Total number of shares
  Returns:
    An array of representing the generated secret shares for m users with l bytes each.

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